#include <iostream>

using namespace std;

int day[] ={0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main()
{
	int x, y;
	cin >> x >> y;
	int ret = 0;
	for(int i = 1; i <= 12; i++)
	{
		for(int j = 1; j <= day[i]; j++)
		{
			int k = j % 10 * 1000 + j / 10 * 100 + i % 10 * 10 + i / 10;
			int sum = k * 10000 + i * 100 + j;
			if(sum >= x && sum <= y)
			    ret++;
		}
	}
	cout << ret << endl;
	return 0;
 } 
